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[单选题]

The following is an excerpt from the cumulative distribution function for the standard normal random variable table:

A variable is normally distributed with a mean of 2.00 and a variance of 16.00. Using the excerpt, the probability of observing a value of 7.40 or less is closest to:

A.96.8%.

B.91.2%.

C.63.3%.

参考答案与解析：

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